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This study measured kerma-area product (PKA) in digital radiography, establishing local diagnostic reference levels (LDRLs) for adult patients. Some procedures exceeded established benchmarks, indicating a need for radiation dose optimization.

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Area of Science:

  • Medical Physics
  • Radiological Dosimetry
  • Diagnostic Imaging

Background:

  • The kerma-area product (PKA) meter is increasingly vital in dosimetry.
  • Digital radiography necessitates accurate PKA measurements for patient safety.

Purpose of the Study:

  • To measure PKA values in adult patients undergoing various digital radiographic procedures.
  • To calculate effective doses (ED) and establish local diagnostic reference levels (LDRLs).
  • To compare findings with existing national and international diagnostic reference levels (DRLs).

Main Methods:

  • Measurements of PKA were performed on 300 adult patients following IAEA protocols.
  • Effective doses were calculated using PKA measurements and ICRP 103 conversion coefficients.
  • Third-quartile PKA values were determined for specific radiographic examinations.

Main Results:

  • Third-quartile PKA values ranged from 0.19 to 3.15 Gycm² across different procedures.
  • Estimated mean effective doses varied from 0.005 to 0.258 mSv.
  • Significant variations were observed when comparing PKA values to UK DRLs and previous LDRLs, with some procedures exceeding benchmarks.

Conclusions:

  • The study proposes third-quartile PKA values as LDRLs for digital radiographic procedures.
  • Results highlight specific procedures (chest PA, cervical spine AP, lumbar spine LAT) requiring optimization to reduce radiation exposure.
  • The established LDRLs can inform future national DRLs and improve radiation protection practices.